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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FLINK-11191) Exception in code generation when ambiguous columns in MATCH_RECOGNIZE
Date Tue, 18 Dec 2018 14:40:00 GMT

     [ https://issues.apache.org/jira/browse/FLINK-11191?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

ASF GitHub Bot updated FLINK-11191:
-----------------------------------
    Labels: pull-request-available  (was: )

> Exception in code generation when ambiguous columns in MATCH_RECOGNIZE
> ----------------------------------------------------------------------
>
>                 Key: FLINK-11191
>                 URL: https://issues.apache.org/jira/browse/FLINK-11191
>             Project: Flink
>          Issue Type: Bug
>          Components: Table API &amp; SQL
>    Affects Versions: 1.7.0, 1.8.0
>            Reporter: Dawid Wysakowicz
>            Assignee: Dawid Wysakowicz
>            Priority: Major
>              Labels: pull-request-available
>
> Query:
> {code}
> SELECT *
> FROM Ticker
> MATCH_RECOGNIZE (
>   PARTITION BY symbol, price
>   ORDER BY proctime
>   MEASURES
>     A.symbol AS symbol,
>     A.price AS price
>   PATTERN (A)
>   DEFINE
>     A AS symbol = 'a'
> ) AS T
> {code}
> throws a cryptic exception from the code generation stack that the output arity is wrong.
We should add early validation and throw a meaningful exception. 
> I've also created a calcite ticket to fix it on calcite's side: [CALCITE-2747]



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